Types of Electrophiles

Q. The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is :

(1) (B) < (A) < (D) < (C)
(2) (B) < (A) < (C) < (D)
(3) (A) < (C) < (D) < (B)
(4) (A) < (B) < (C) < (D)

1. $1$
2. $4$
3. $2$
4. $3$